Inspection Procedure 32

Ignition Switch-ST System and Park/Neutral Position Switch System.

Connectors:

COMMENT
- If the selector lever is moved to "P" or "N" range and the ignition switch is turned to "START" position, battery positive voltage is supplied to PCM (terminal 58) through the ignition switch and park/neutral position switch. Because of this, the PCM detects that the engine is cranking.
- The park/neutral position switch detects the selector lever position (P, N or other ranges) and converts it to a voltage signal (high or low). Then the park/neutral position switch sends that signal to the PCM.

If the selector lever is moved to "P" or "N" range with the ignition switch turned on (except "START" position), continuity will exist between the PCM and ground through the park/neutral position switch and starter motor. The terminal voltage of the PCM will become low. If the selector lever is moved to the other ranges, continuity will be lost between the PCM and ground. The terminal voltage of the PCM will become high.

TROUBLESHOOTING HINTS (The most likely caused for this code to be set are:)
- Malfunction of the ignition switch.
- Malfunction of the park/neutral position switch.
- Improper connector contact, open circuit or short circuit in the harness wire.
- Malfunction of the PCM.

DIAGNOSIS




STEP 1. Check connector B-111 at park/neutral position switch for damage.

Q: Is the connector in good condition?

YES: Go to Step 2.

NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.

STEP 2. Check the park/neutral position switch.

Q: Are there any abnormalities?

YES: Go to Step 3.

NO: Repair or replace it. Then confirm that the malfunction symptom is eliminated.




STEP 3. Check the power supply voltage at park/neutral position switch connector B-111.
1. Disconnect the connector B-111 and measure at the harness side.
2. Turn the ignition switch to the "START" position.
3. Measure the voltage between terminal 10 and ground.
- Voltage should be battery positive voltage.
4. Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the voltage normal?

YES: Go to Step 4.

NO: Check connector C-25 at intermediate connector for damage, and repair or replace as required. Refer to Harness Connector Inspection. If intermediate connector is in good condition, repair harness wire between ignition switch connector C-202 terminal 5 and park/neutral position switch connector B-111 terminal 10 because of open circuit. Then confirm that the malfunction symptom is eliminated.




STEP 4. Check connector C-115 at PCM for damage.

Q: Is the connector in good condition?

YES: Go to Step 5.

NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.







STEP 5. Check for open circuit and short circuit to ground and harness damage between park/neutral position switch connector B-111 terminal 9 and PCM connector C-115 terminal 58.

NOTE: Check harness after checking intermediate connector B-13. If intermediate connector is damaged, repair or replace them. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.

Q: Is the harness wire in good condition?

YES: Replace the PCM. Then confirm that the malfunction symptom is eliminated.

NO: Repair it. Then confirm that the malfunction symptom is eliminated.